Download Galaxy 94HP - Hot Spot CB

TABLE OF CONTENTS
PAGE
CHAPTER 1
DX 94HP
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CHAPTER 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Installing The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Public Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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CHAPTER 3
10 Meter
Amateur Mobile Transceiver
With Built-in Frequency Counter &
StarLite Face Plate
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Procedure to Receive and Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Receiving SSB Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Alternate Microphone and Installation . . . . . . . . . . . . . . . . . . . . . . . . . .
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OWNER’S MANUAL
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CHAPTER 1 SPECIFICATIONS
GENERAL
Model
Frequency Range
Emission
Frequency Control
Frequency Stability
Temperature Range
Antenna Impedance
Antenna Connectors
Input Voltage
Size
Weight
Transmit Current
Spurious Emission
Unwanted Sideband
Audio Distortion
Frequency Response
Microphone
Clarifier Range
INSTALLING THE RADIO
DX 94HP
28.315 ~ 28.755 MHz
AM/USB/LSB
Phase-Lock-Loop (PLL) Synthesizer
0.001%
-30°C to +50°C
50 Ohms
Standard SO-239 type
13.8V DC
Choose a convenient location for operation that does not interfere with driver or
passenger. This radio is supplied with a universal mounting bracket. When mounting
the bracket and radio to your car, make sure it is mechanically strong. Also, provide a
good electrical grounding connection to the chassis of vehicle. Proceed as follows to
install the radio.
7 3/4" (W) x 2 7/8" (H) x 10 1/4" (D)
6 lb.
2.
Most radio antennas come equipped with a PL-259 plug. Connect this plug to the
ANT. Jack in the rear of the radio.
3.
Extending from the rear of the radio is a fused red and black wire for the DC
connections to the vehicle’s electrical system. For best performance, it is strongly
recommended that red lead be connected directly to the positive terminal on the
vehicle’s battery and the black lead be connected directly to the negative terminal
on the battery. (Note, not connecting both leads direct to the battery may cause
performance problems) This radio is designed for vehicles with negative ground
systems.
TRANSMITTER
RF Power Output
CHAPTER 2 INSTALLATION
1. Locate a convenient area in your vehicle for the installation of the radio. Hold the
mounting bracket with the radio in the location where the radio is to be installed.
Make sure nothing will interfere with either the radio or the mounting bolts. Mark
and then drill holes for the mounting bracket.
AM: 5W~40W
USB/LSB: 100W PEP
AM: 14 Amps
SSB: 25 Amps
-50 dB
-50 dB
10%
300 to 2500Hz
Dynamic
Coarse: ± 6.0KHz, Fine: ± 1.0KHz
Connections should be made using appropriate “crimp on” lugs of a size large
enough to make good contact with the bolt used to fasten to the battery and the
chassis ground. It is a good safety idea to install a second 30 amp fuse that would
provide protection in case the red wire was to “fray” or get pinched and short to the
body of the vehicle, somewhere between the battery and the radio.
RECEIVER
Sensitivity for 10 dB (S+N)/N
Squelch Sensitivity
Selectivity
Image Rejection
AGC Figure of Merit
Audio Power Output
Audio Response
AM: < 0.5 μV; USB/LSB: < 0.25 μV
< 0.5 uV
-55 dB
-50 dB
100 mV for 10dB Change in Audio Output
2.5W @ 10% Distortion
300 to 2500 Hz
High power radios such as this one require large DC current flow when in the TX
mode. Poor power connections cause supply voltage drops that can substantially
decrease the performance of your radio. A good DC connection is probably one of
the most important things for getting the best transmitter performance and in some
cases, least receiver noise.
4.
Mount the microphone bracket near the radio in an easily accessible spot using the
two screws provided.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
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IGNITION NOISE INTERFERENCE
With weak signals, you may experience interference of the signal by background
noise. This radio has NB and ANL circuits that will help reduce background noise from
sources such as your ignition system. However, background electrical noise may come
from several sources and all noise may not be eliminated. With extremely weak signals,
you can operate this radio with the engine turned off, which should improve reception.
If the ignition noise level is too high to allow proper operation under most conditions,
you should have your installation of the radio checked by a qualified technician.
CHAPTER 3 OPERATION
CONTROL FUNCTIONS
FRONT PANEL
ANTENNA
This radio has a jack in the rear for a standard PL-259 antenna plug. If you are
looking for the most range for your transmission, use a vertically polarized, quarterwave length antenna. If antenna height is a problem, you may use a shorter, loaded-type
whip antenna although you can expect some loss of transmission range.
To improve performance, your antenna should be matched to your radio. Your
antenna can be adjusted so that it matches your radio.
EXTERNAL SPEAKER
The external speaker jack (EXT SP.) on the rear panel is used for remote receiver
monitoring. The external speaker should have 8 ohms impedance and be able to handle
at least 4 watts. When the external speaker is plugged in, the internal speaker is
disconnected.
PUBLIC ADDRESS
1. MICROPHONE JACK: Used to connect microphone.
To use the Public Address (PA) function, first connect an external speaker to the PA.
SP. Jack on the rear of the radio. See the above specifications for a proper external
speaker. Keep the speaker away from the microphone to avoid acoustic feedback.
2. MODE SWITCH: This control allows you to select one of the following operating
modes: AM/USB/LSB.
3. ON/OFF VOLUME CONTROL: This knob controls the volume and power to the
radio. To turn radio on, rotate the knob clockwise. Turning the knob further will
increase the volume of the receiver.
4. SQUELCH CONTROL: This knob is used to eliminate background noise being
heard through the receiver, which can be disturbing when no transmissions are
being heard through the receiver. To use this feature, turn the knob fully
counterclockwise and then turn clockwise slowly until the background noise is just
eliminated. Further clockwise rotation will increase the threshold level that a signal
must overcome in order to be heard. Only strong signals will be heard at a
maximum clockwise setting.
5. MIC GAIN CONTROL: Adjusts the microphone gain in transmit and PA modes.
This controls the gain to the extent that full talk power is available several inches
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away from the microphone. In the Public Address (PA) mode, the control functions
as the volume control.
6. RF GAIN CONTROL: Adjust this knob for desired level of incoming signal.
7. DIM CONTROL: This knob controls the level of brightness for the meter lamp,
faceplate, frequency display and channel display. Turn clockwise to activate
backlight circuit.
8. RF POWER CONTROL: This control allows the user to adjust RF power output.
9. ECHO CONTROL: This control is used to adjust echo effect.
10. TIME CONTROL: This control is used to adjust intervals of echo.
11. FINE/COARSE CONTROL: Allows variation of the radio operating frequencies
above and below the channel frequency. Although this control is intended primarily
to tune in SSB signals, it may be used to optimize AM signals.
12. CHANNEL SELECTOR: This control is used to select the desired transmit and
receive channel.
18. OFF/ NB/ANL /FD.OFF SWITCH: In the NB/ANL position, the RF Noise
Blanker and the automatic Noise Limiter in the audio circuits are also activated.
The Noise Blanker is very effective in eliminating repetitive impulse noise such as
ignition interference. When the switch is in the F.D.OFF position, the frequency
Display is OFF.
19. OFF/ECHO/VC SWITCH: With the switch in VC position you can adjust the
tone and pitch of your voice. With the switch in ECHO you can add echo and
reverb to your voice. In the OFF position your voice will sound natural.
20. FREQUENCY COUNTER: This display indicates the frequency of the selected
channel.
21. OFF/+10K/PA SWITCH: When the switch is in the +10KHz position, the
frequency is shifted up 10KHz. In the PA position, the radio acts as public address
amplifier. Your voice will come out of the speaker that is plugged into the PA. SP.
jack on the rear panel. The radio does not operate when you are in the PA mode.
22. CHANNEL DISPLAY: The channel display indicates the current selected channel.
13. FRONT PANEL METER: The front panel meter allows the user to monitor
incoming signal strength, RF output power and SWR level.
14. ILLUMINATED FACE PLATE: All faceplate lettering will fully illuminate to
allow the user easy viewing at night. This unique, solid state, backlight is designed
to maximize night vision while minimizing eye fatigue. Therefore, it is ideal for
both day or night.
15. BAND SELECTOR: This switch is used to select the band.
16. PWR/SWR/RB SWITCH: When in the RB position, the radio transmits an audio
tone at the end of your transmission to indicates that transmission has ended. As a
courtesy to others, use the Roger Beep only when necessary. When the switch is in
the “SWR” position, the meter indicates the Standing Wave Ratio (SWR) of your
antenna. There are no adjustments because the SWR circuit in this radio calibrates
itself automatically (accurate at maximum power output). When this switch is in
“PWR” position, the meter indicates your power output.
17. TALKBACK CONTROL: This feature is used to monitor your own voice. For
example, you could use this feature to compare different microphones. This knob
controls the volume of the Talkback level. The Talkback circuit is off when the
MIC GAIN knob is depressed.
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REAR PANEL
PROCEDURE TO RECEIVE AND TRANSMIT
A. MICROPHONE
The push-to-talk switch on the microphone controls the receiver and transmitter. Press
the switch and the transmitter will activate, release switch to receive. When transmitting,
hold the microphone two inches from your mouth and speak clearly in a normal voice.
This transceiver comes complete with a low impedance dynamic microphone.
B. PROCEDURE TO RECEIVE
1. Be sure that power source, microphone and antenna are connected to the proper
connectors before going to the next step.
2. Turn VOL knob clockwise to apply power to the radio.
3. Set the VOL for a comfortable listening level.
4. Set the MODE switch to the desired mode.
1. ANTENNA: This jack accepts a 50-ohm coaxial cable with a PL-259 type plug.
2. DC POWER: This jack accepts the 13.8V DC power cable with built-in fuses. The
power cord provided with the radio has a black and red wire. The black goes to
negative and red goes to positive.
5. Listen to the background noise from the speaker. Turn the SQ knob slowly
clockwise until the noise just disappears. The SQ is now properly adjusted. The
receiver will remain quiet until a signal is actually received. Do not advance the
control too far or some of the weaker signals will not be heard.
6. Set the CHANNEL selector switch to the desired channel.
3. PA SP: This jack is for PA operation. Before operating, you must first connect a
PA speaker (8 ohms, 4W) to this jack.
7. Adjust COARSE/FINE control to clarify the SSB signals or to optimize AM/FM
signals.
4. EXT. SP: This jack accepts a 4 to 8 ohm, 5-watt external speaker. When the
external speaker is connected to this jack, the built-in speaker will be disabled.
C. PROCEDURE TO TRANSMIT
1. Select the desired channel of operation.
2. Set the MIC GAIN control fully clockwise.
3. If the channel is clear, depress the push-to-talk switch on the microphone and speak
in a normal voice.
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RECEIVING SSB SIGNALS
There are four types of signals presently used for communications: FM, AM, USB
and LSB. When the MODE switch on your unit is placed in the AM position, only
standard double-side band and in FM position, only frequency deviation, full carrier
signals will be detected. An SSB signal may be recognized while in the AM or FM
mode by its characteristic "Donald Duck" sound and the inability of the detector to
produce an intelligible output. The USB and LSB modes will detect upper sideband and
lower sideband respectively, and standard AM signals.
SSB reception differs from standard AM reception in that an SSB receiver does not
require a carrier or opposite side band to produce an intelligible signal. A single-side
band transmitted signal consists only of the upper or the lower side band and no carrier
is transmitted. The elimination of the carrier from the AM signal helps to eliminate the
biggest cause of whistles and tones heard on channels that make even moderately strong
AM signals unreadable. Also, SSB takes only half the space of an AM channel,
therefore two SSB conversations will fit into each channel, expanding the 40 AM
channels to 80 SSB channels. The reduction in channel space required also helps in the
receiver because only half of the noise and interference can be received with 100% of
the SSB signal.
An SSB signal may be received only when the listening receiver is functioning in the
same mode. In other words, an upper side band signal (USB) may be made intelligible
only if the receiver is functioning in the USB position.
Thus when a voice is used in place of a whistle or tone, in the proper listening mode
the voice will be received correctly whereas in the incorrect mode, the voice will be
translated backwards and cannot be made intelligible by the COARSE/FINE control.
When listening to an AM transmission, a correct side band is heard in either mode since
both upper and lower side bands are received.
Once the desired SSB mode has been selected, frequency adjustment may be
necessary in order to make the incoming signal intelligible. The COARSE/FINE control
allows the operator to vary frequency above or below the exact frequency of the
channel. If the sound of the incoming signal is high or low pitched, adjust the operation
of the COARSE/FINE.
Consider it as performing the same function as a phonograph speed control. When the
speed is set too high, voices will be high-pitched and if set too low, voice will be lowpitched. Also, there is only one correct speed that will make a particular record produce
the same sound that was recorded. If the record is played on a turntable that is rotated in
the wrong direction (opposite side band) no amount of speed control (COARSE/FINE)
will produce an intelligible sound.
An AM signal received while listening in one of the SSB modes will produce a steady
tone (carrier) in addition to the intelligence, unless the SSB receiver is tuned to exactly
the same frequency by the COARSE/FINE control. For simplicity, it is recommended
that the AM modes be used to listen to AM signals.
If a lower side band (LSB) signal is heard when the receiver is in the USB mode, no
amount of tuning will make the signal intelligible. The reason for this may be
understood if you consider that when the modulation is applied to the transmitter's
microphone in the USB mode, the transmitter output frequency is increased whereas in
the LSB mode the transmitter's output frequency is decreased.
The result in listening to the receiver is that when the MODE switch is in the proper
position (either USB or LSB), a true reproduction of a single tone of modulation will
result, and if the tone is increased in frequency (such as a low-pitched whistle or a highpitched whistle) you will hear the increase in the output tone of the receiver. If the
incorrect mode is selected, an increase in tone of a whistle applied to the transmitter
will cause a decrease in the resultant tone from the receiver.
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ALTERNATE MICROPHONES AND INSTALLATION
For best results, the user should select a low-impedance dynamic type microphone or
a transistorized microphone. Transistorized type microphones have low output
impedance characteristics. The microphones must be provided with a four-lead cable.
The audio conductor and its shielded lead comprise two of the leads. The third lead is
for transmit control and fourth is for receiving control.
Before beginning the actual wiring, read carefully the circuit and wiring information
provided with the microphone you select. Use the minimum heat required in soldering
the connections. Keep the exposed wire lengths to a minimum to avoid shorting when
the microphone plug is reassembled.
The microphone should provide the functions shown in the schematic below.
4 WIRE MIC CABLE
Pin Number
Mic Cable Lead
1
Audio Shield
2
Audio Lead
3
Transmit Control
4
Receive Control
Fig. 2 Microphone plug wiring
To wire the microphone cable to the plug provided, proceed as follows:
Fig. 1 Your transceiver microphone schematic.
If the microphone to be used is provided with pre-cut leads, they must be revised as
follows.
1. Cut leads so that they extend 7/16" beyond the plastic insulating jacket of the
microphone cable.
1. Remove the retaining screw.
2. Unscrew the housing from the pin receptacle body.
3. Loosen the two cable clamp retainer screws.
4. Feed the microphone cable through the housing, knurled ring and washer as shown
Figure 2.
2. All leads should be cut to the same length. Strip the ends of each wire 1/8" and tin
the exposed wire.
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5. The wires must now be soldered to the pins as indicated in the above wiring tables.
If a vise or clamping tool is available it should be used to hold the pin receptacle
body during the soldering operation, so that both hands are free to perform the
soldering. If a vise or clamping tool is not available, the pin receptacle body can be
held in a stationary position by inserting it into the microphone jack on the front
panel. The numbers of the microphone plug are shown in Fig. 3, as viewed from
the back of the plug. Before soldering the wire to the pins, pre-tin the wire
receptacle of each pin of the plug.
9. The two cable clamp retainer screws should now be tightened to secure the housing
to the microphone cord. If the cutting directions have been carefully followed, the
cable clamp should secure to the insulation jacket of the microphone cable.
10. Upon completion of the microphone plug wiring, connect and secure the
microphone plug in the transceiver.
Fig. 3 Microphone plug pin numbers viewed from rear of pin receptacle.
6. Be sure that the housing and the knurled ring of Figure 2 are pushed back onto the
microphone cable before starting to solder. If the washer is not captive to the pin
receptacle body, make sure that it is placed on the threaded portion of the pin
receptacle body before soldering.
7. If the microphone jack is used to hold the pin receptacle during soldering operation,
best results are obtained when the connections to pin 1 and 3 are made first and
then the connections to pins 2 and 4. Use a minimum amount of soldering and be
careful to prevent excessive solder accumulation on pins, which could cause a short
between the pin and the microphone plug housing.
8. When all soldering connections to the pins of the microphone are completed, push
the knurled ring and the housing forward and screw the housing onto the threaded
portion of the pin receptacle body. Note the location of the screw clearance hole in
the plug housing with respect to the threaded hole in the pin receptacle body. When
the housing is completely threaded into the pin receptacle body, a final fraction of a
turn either clockwise or counterclockwise may be required to align the screw hole
with the threaded hole in the pin receptacle body. When these are aligned, the
retaining screw is then screwed into place to secure the housing to the pin
receptacle body.
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MEMO
MEMO
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WARRANTY
This radio is covered by a two
year Limited parts and labor
warranty.
z
“Limited” means that we will repair problems caused by factory defects or normal
use at no charge. This warranty does not cover any modifications made to the radio
and any modification may void the warranty completely.
z
Before returning a radio to us for warranty service, please call our Service
Department for a Repair Authorization Number (RAN). This RAN must be written
below your return address on the outside of the shipping box. Boxes, which arrive
without an RAN, will be refused, and the shipping company will return the
unopened box to you. Be sure to have a pen and paper ready along with the serial
number of your radio before calling. We will give you the RAN and our shipping
address over the phone. The telephone number of the Service Department is (760)
480-8800, and we suggest calling between 10:00 AM and 4:00 PM Pacific Time.
z
Please include a note with a detailed description of the symptoms. This is important
because it will help the technician who works on your radio to locate your problem.
Intermittent problems are easily overlooked, so be sure to give as much detail as
possible in your note. Also, please include your daytime telephone number in case
our technicians have any additional questions.
z
Do not send your power cord or microphone unless we ask for these items during
our telephone conversation.
z
You are responsible for getting the radio safely to us. (We suggest using United
Parcel Service.) You must pay to ship the radio to us, and we will pay to ship the
radio back to you. Since we use UPS and they do not ship to Post Offices boxes,
please provide us with a street address for the return of your radio.
z
We will repair and return your radio as soon as we can. We appreciate your
choosing a Galaxy radio and we want you to be on the air as much as possible!
Be sure to visit our web site at
www.GalaxyRadios.com
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Printed in Taiwan
ATDX98010C
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